Answer:
d.51
Step-by-step explanation:
Let the 3rd angle of the triangle be y. Then:
y+117=180
y=63
Then:
x=180-63-66
=51°
Answer:
Yes it can, because −1.5 lies to the left of −0.5
On the surface of the pond
First you check for Pythagoras' Theorem.
Is 8.6² = 8.1² + 2.6² ?
8.1² + 2.6² = 65.61 + 6.76 = 72.37
8.6² = 73.96
8.1² + 2.6² ≠ 8.6²
Since Pythagoras' Theorem is not satisfied it is not a right angled triangle.
The longest side is 8.6, let's find the angle facing the longest side 8.6.
By cosine formula CosA = (b² + c² - a²) / (2bc)
CosA = (2.6² + 8.1² - 8.6²) / (2*2.6*8.1) = -1.59/42.12 = -0.0377
A = Cos inverse (-0.0377) = 92.1 degrees
So there is an angle is greater than 90 degrees.
The answer is x= -3, or <span> x = -2/11 = -0.182</span>
Answer:
1. e
2. c
3. d
4. a
5. b
Step-by-step explanation:
